Yep , like I said earlier you can see in earlier post, we did tried all steps except complete removal and reinstallation process.
I don't usually recommend complete removal process without trying few things.
They should have tried by renaming Caps folder once before complete removal process. sometimes if the Media data base file is corrupted , it will affect installation process.
Anyhow , glad to hear that the issue has been resolved.
All the best , Donald. Finally